Here are some of the stores that I shop at regularly. If you want more information on other stores let me know and I will find it for you and post it. I think you need to know coupon policies for each store not all employees are taught the policies correctly. I recommend printing them out and taking them with you to the stores. It is also helpful to have corporate numbers in your phone.
CVS Pharmacy 800-746-7287 doesn't have one that you can print out at this time. I am going to dig up more info on there policy.
Rite Aid 800-748-3243